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  1. beyond calculable or appraisable value; of inestimable worth; priceless: an invaluable art collection; her invaluable assistance.
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Origin of invaluable

1570–80; in-3 + valuable, in obsolete sense “capable of valuation”
Related formsin·val·u·a·ble·ness, nounin·val·u·a·bly, adverb

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Antonyms for invaluable

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for invaluable

helpful, valuable, costly, dear, expensive, inestimable, precious, serviceable

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Contemporary Examples of invaluable

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British Dictionary definitions for invaluable


  1. having great value that is impossible to calculate; priceless
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Derived Formsinvaluableness, nouninvaluably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for invaluable


1570s, "above value," from in- (1) "not" + value (v.) "estimate the worth of" + -able. It also has been used in a sense "without value, worthless" (1630s).

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Online Etymology Dictionary, © 2010 Douglas Harper